protected from overcurrent
c.
20. Identify from the list below the test which used verify that all fuses,
circuit breakers and switches are connected the line conductor:
a. Zone protection. Use sketch with notes explanation show how mini-trunking and
skirting trunking could used contain all the electrical supplies a
school’s computing classroom. State the advantages conduit trunking and tray cable enclosure
system for commercial installation such shopping centre. Every caravan pitch must have least one 16A socket outlet for
connection caravan.
25. buried depth 600mm. only competent people may work ‘live’
d.365
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
19. earth fault loop impedance
c. All final circuits bathroom, both power and lighting, must have:
a. one may work ‘live’
c. only instructed and skilled people may work ‘live’. The socket outlet must be:
a. RCD protection
c. protected additionally RCD
d. continuity test
b. functional test
d. Use sketch with notes explanation show the earthing and
protective bonding arrangements the mains intake position a
230V system. the industrial type
b.
22. The Electricity Work Regulations state that:
a.
23.
24.
21. Use sketch with notes explanation show the earthing and
protective bonding arrangements the mains intake position a
230V cable sheath supply. overcurrent protection
b. Compare PVC/SWA cables with cables and give their advantages,
disadvantages and typical applications. everyone may work ‘live’
b.
26.
27.
. IPX7 protection
d. polarity test
